I am 2 weeks post op and have noticed this week that I am extremely tired, is this normal? How long will it last for?

Most likely would you are experiencing his a combination of some temporary residual effects from having undergone anesthetic, the postoperative use of pain medications, and your body focusing energies to heal internally.  Stay active, stay hydrated, the well with good proteins and vitamins, and this should pass uneventfully.  Keep in contact with your plastic surgeon.Best of luck!
Dr. SubbioBoard-Certified Plastic SurgeonNewtown Square/Philadelphia, PA

It can take several weeks to recover from surgery. A lot of the symptoms you describe can because by use of pain medication. It would be very unusual to develop illness or symptoms from your implants as soon as two weeks after your surgery. Discuss your concerns with your surgeon.

Your body expends a lot of energy to recover from surgery even though you mightn't think so. It can take several weeks to a few months to build up your stamina again.